Realization of 16-channel digital PGC demodulator for fiber laser sensor array

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Realization of 16-channel digital PGC demodulator for fiber laser sensor array"

Transcription

1 Journal of Physics: Conference Series Realization of 16-channel digital PGC demodulator for fiber laser sensor array To cite this article: Lin Wang et al 2011 J. Phys.: Conf. Ser View the article online for updates and enhancements. Related content - Application of fiber Bragg grating sensors for the micro-strain measurement of optical components surface Z G Wang, J X Li and R H Zhu - Fiber optic magnetic field sensor based on the TbDyFe rod Feifei Chen and Yi Jiang - Modeling of Tunable DBRs Lasers Based on Transmission-Line Laser Model Tan Shu and Yonglin Yu This content was downloaded from IP address on 27/04/2018 at 07:29

2 Realization of 16-channel digital PGC demodulator for fiber laser sensor array Lin Wang, Jun He, Fang Li, and Yu-Liang Liu (Optoelectronics System Laboratory, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing , P.R. China) Abstract. This paper describes a 16-element DFB FL (distributed feedback fiber laser) sensor array system interrogated by NI-PXI-based (PCI extensions for Instrumentation) digital PGC (phase generated carrier) technique. The lasing wavelengths of the DFB FLs are changed by the external strains or temperatures, and hence they can be used as sensors by detecting the wavelength shifts. An unbalanced MI (Michelson interferometer) is employed in the sensor array system to amplify the wavelength shifts of DFB FL sensors to detectable phase shifts. The output phase signals of the MI are separated into different channels by a DWDM, and then detected by a low-noise photodiode array. The digital PGC algorithm is realized on a PXI platform (NI, National Instruments), which consists of three FPGA (Field Programmable Gate Array) modules and a high performance system controller. The normalization of the interference fringe is proposed and realized in this paper to reduce the influence of the light intensity fluctuations, and a trigger mechanism is introduced into the digital multi-channel PGC demodulation scheme to synchronize the date among different channels. A 16-element DFB fiber laser sensor array system has been set up in the experiment and the demodulated results have demonstrated a minimum detectable wavelength shift of pm/ Hz, a linearity of as high as , and a dynamic range of 1. Introduction With the development of optical fiber sensor techniques, fiber sensor networks have been widely studied for the applications in the fields of petroleum seismic exploration, earthquake prediction, and security. The DFB FL sensor has attracted considerable research interests for its many unique advantages, including small size, light weight, high sensitivity, and especially the intrinsic ability to be wavelength division multiplexed along a single fiber [1]. In 1995, K P Koo and A D Kersey achieved a two fiber laser sensors array system using phase-locked demodulating technique [2]. In 2007, a four-element fiber laser hydrophone array was reported with the demodulation by a 3 3 coupler [3]. Among the various demodulation schemes adopted in optical fiber sensor system, the PGC technique has been widely used for its advantages of high resolution, large dynamic range and high stability. However, the application of the traditional analog-circuit-based PGC technique is limited by the characteristics of the electronic device, and it has the disadvantages as the difficulty of changing parameters, the sensitivity to environmental noise, and the instability. Compared with the analog-pgc, the digital PGC technique is much easier to be realized, and it is insensitive to the environmental interference, so it is more suitable for demodulating large scale WDM fiber laser sensors array. But on the other hand, the digital PGC algorithm needs relatively complex calculations to recover the phase signals [4]. It requires a high performance demodulation system to carry out the great amount of Published under licence by Ltd 1

3 real-time calculations. In fact, it is difficult to realize the PGC algorithm on a personal computer for the simultaneous demodulation for a DFB FL sensor array system. The NI-PXI system is a commercialized digital signal processing system produced by the National Instrument Corporation. It is based on the FPGA modules and a powerful system controller, which provides high performance and reliability. A 16-element fiber laser sensor array system is set up using the digital PGC demodulation technique based on the NI-PXI system and corresponding LabVIEW software in this paper. The system has achieved a high performance demodulation of 16-channel PGC signals in a real-time manner. And the simultaneous demodulation of the 16-element DFB fiber laser sensor array system with a high wavelength resolution is also confirmed by the experiments in this paper. 2. Principle 2.1. The principles of PGC algorithm The lasing wavelength of a DFB FL sensor will be changed by the external strains or temperatures. An unbalance Michelson interferometer is employed to amplify the wavelength shift of DFB FL sensor into the detectable phase shift of the MI [5]. 2π n L ϕ = λ (1) 2 λ where ϕ is the phase shift of the MI, λ is the wavelength shift of laser, n is the refractive index of fiber, and L is the path difference of the two arms of the unbalance MI. In the PGC technique a large amplitude phase modulation carrier at a higher frequency out of the signal band is introduced into one arm of the interferometer, and hence eliminates the signal-fading caused by the initial phase drifts of the MI. The output signal of the MI can be expressed as: I = A+ Bcos( Ccos ωct+ ϕs ( t) + ϕenv ) (2) where the constant A and B are proportional to the incident light intensity, B also correlates with the visibility of the interferometric signal, C is the modulation depth, ωc is the angular frequency of the carrier, ϕ () t is the signal of interest, and s ϕenv is the initial phase of the MI with the external disturbance. The output phase signal of the MI is mixed with Gcosω c t and Hcos(2 ω c ) t to produce two channels of signals, respectively. After the following operations as shown in figure 1, including LPF (low-pass filtering), differential, cross-multiplying, integrating, and HPF (high-pass filtering), the recovered sensing signal of interest can be obtained as: 2 B GHJ1( C) J 2( C) ϕ ( t) (3) where J 1 ( C) and J 2 ( C) are Bessel functions. Figure 1. The schematic algorithm of PGC technique. 2

4 Because the final demodulated result is proportional to B 2. B is decided by the light intensity and the visibility of the MI, the recovered signal will change with the fluctuation of the light and external disturbance. So the system cannot get the desired signal of interest. To eliminate the influence of the variations of light intensity, the peak-to-peak normalization is introduced into the digital PGC algorithm. The basic principle of the normalization is shown as follows: x xmin y = (4) x x Max Min Max and x Min where y is the result of the normalization of x, x is the maximal value and the minimum value of the sampled date. By adopting the normalization scheme, the demodulation result can be expressed as GHJ1( C) J 2( C) ϕ ( t), so the influence of light intensity has been eliminated The realization of PGC on NI-PXI PXI is a modular instrumentation platform originally introduced in 1997 by National Instruments as a basis for building electronic test equipment or automation systems. And the platform always combines a signal system controller and various kinds of modules to set up a real measurement system. On account that the PC-based (personal computer) PGC demodulation scheme can not afford the great amount of calculations, three high performance FPGA modules are selected to build up the PXI platform to realize the simultaneous PGC demodulation for the 16-element DFB fiber laser sensor array system in this paper. The PGC algorithm is mainly programmed on the FPGA except for the band-pass filtering on the duo-core system controller, as shown in figure 2. And the programme is achieved by a graphical development environment: NI LabVIEW, which can help to save developing time. Signal sample normalize On FPGA FFT and Display On CPU Frequency-mixing Low-pass filtering FIFO DCM FIFO High-pass filtering Desample Figure 2. The structure of the program of PGC algorithm realized on the FPGA modules and the system controller. In order to realize the PGC technique on FPGA, three key techniques have been adopted in the program. Firstly, the program should be developed as parallel execution to make sure that the PGC technique could be carried out simultaneously for different channels, and the PXI could demodulate the signals from the multiplexed DFB laser sensor system. Secondly, the algorithm is processed digitally one point by one point on the FPGA module. It means that the program will not allow new samples until the processing of a former point has been finished. Therefore, the PGC technique should be separated into several sections, as shown in figure 2, so as to ensure a high sampling rate [6]. At last, a trigger mechanism, as shown in figure 3, must be employed in the program for the synchronization between different channels to ensure the validity of the demodulated results. When the demodulation system starts to work, a trigger signal is sent by a master FPGA module at first, and then the other two FPGA modules receive the trigger, which is an order as to begin to sample. Such a trigger mechanism can assure the synchronization of all the FPGA modules. 3

5 FPGA 2 FPGA 1 Receive the trigger then start Start Release a trigger then start FPGA 3 Receive the trigger then start Figure 3. The trigger mechanism adopted in the digital multi-channel PGC demodulation scheme. The program on the system controller is also completed using LabVIEW. Its main function is to carry out the process of band-pass filtering and the fast Fourier transform (FFT), and to display the demodulated results both in the time domain and in the frequency domain. The interface of the program is shown in figure 4. Figure 4. The interface of the demodulation program on the system controller. 3. Experiment and result The schematic diagram of the proposed 16-element DFB fiber laser sensor array system is shown in figure 5. 4

6 Figure 5. The Schematic diagram of the proposed 16-element DFB FL sensors array system. Sixteen DFB fiber lasers were pumped by a 980nm semiconductor laser. They were stuck parallelly on a rectangular piezoelectric transducer (PZT). A sinusoidal test signal was given to the sensors by electrical modulating the PZT. The path difference of the MI was 5 m. Two faraday rotator mirrors were incorporated at the end of the MI arms to make the interferometer polarization insensitive. The output phase signals of the MI were separated into different wavelength channels by DWDM, and the detected analog electronic signals were converted into digital signals. Then the PGC algorithm was processed on the three I/O FPGA modules. The sampling rate of A/D converter is 100 ks/s and the frequency of the carrier is 10 khz. The test signal is 100Hz and the demodulated results of sixteen sensors are demonstrated in time domain as shown in figure 6. The minimum detectable wavelength shift of the system is determined by the noise level, which is pm/ Hz, as shown in figure 7. The linearity between the test signal and the demodulated results can reach as high as at each test frequency. as the linearity at 100Hz shown in figure 8. A dynamic range of has been achieved by the PGC demodulation scheme in this system, as shown in figure 9. Figure 6. The demodulated results of 16 channels in time domain. 5

7 Figure 7. The figure of the noise level. Figure 8. The linearity of the system at the frequency of 100Hz. Figure 9. The dynamic range of the system. 4. Conclusion In this paper, a 16-element DFB fiber laser sensor array system is demonstrated using PGC demodulation scheme. The key techniques of the high performance real-time 16-channel PGC demodulation based on a NI-PXI platform have been introduced. Experimental system has been set up in the laboratory. And the demodulation results show that a minimum detectable wavelength shift of pm/ Hz, a linearity of as high as , and a dynamic range of References [1] Anthony Dandridge, Alan B Tveten and Thomas G Giallorenzi 1982 Homodyne demodulation scheme for fiber optic sensors using phase generated carrier IEEE Journal of Quantum Electronics. 18 [2] K P Koo, A D Kersey 1996 Fiber laser sensor with ultrahigh strain resolution using interferometric interrogation Electron. Lett. 31(4) [3] Yi Jiang 2007 Wavelength division multiplexing addressed four-element fiber optical laser hydrophone array Applied Optics. 46(15) [4] Jun Zhu, Pei-Kun He and Chang-Zhen Huang 2004 A design of digital demodulation system using phase generated carrier in fiber hydrophones based on DSP the 3rd Int. Conf. ICCEA. [5] Hao Xiao, Fang Li, and Yu-Liang Liu 2008 Crosstalk analysis of a fiber laser sensor array system based on digital phase-generated carrier scheme Journal of Lightwave Technology. 26 [6] Lei Feng, Jun He, Jing-Yuan Duan, Fang Li, and Yu-Liang Liu 2008 Implementation of Phase Generated Carrier Technique for FBG Laser Sensor Multiplexed System Based on Compact RIO JESTC

Development of High Sensitivity Eight-Element Multiplexed Fiber Laser Acoustic Pressure Hydrophone Array and Interrogation System

Development of High Sensitivity Eight-Element Multiplexed Fiber Laser Acoustic Pressure Hydrophone Array and Interrogation System PHOTONIC SENSORS / Vol. 7, No. 3, 2017: 253 260 Development of High Sensitivity Eight-Element Multiplexed Fiber Laser Acoustic Pressure Hydrophone Array and Interrogation System Ming LI1, 2, Zhihui SUN2,

More information

Low-Frequency Vibration Measurement by a Dual-Frequency DBR Fiber Laser

Low-Frequency Vibration Measurement by a Dual-Frequency DBR Fiber Laser PHOTONIC SENSORS / Vol. 7, No. 3, 217: 26 21 Low-Frequency Vibration Measurement by a Dual-Frequency DBR Fiber Laser Bing ZHANG, Linghao CHENG *, Yizhi LIANG, Long JIN, Tuan GUO, and Bai-Ou GUAN Guangdong

More information

Distributed Acoustic Sensing With Michelson Interferometer Demodulation

Distributed Acoustic Sensing With Michelson Interferometer Demodulation PHOTONIC SENSORS / Vol. 7, No. 3, 217: 193 198 Distributed Acoustic Sensing With Michelson Interferometer Demodulation Xiaohui LIU 1, Chen WANG 1, Ying SHANG 1, Chang WANG 1*, Wenan ZHAO 1, Gangding PENG

More information

High stability multiplexed fibre interferometer and its application on absolute displacement measurement and on-line surface metrology

High stability multiplexed fibre interferometer and its application on absolute displacement measurement and on-line surface metrology High stability multiplexed fibre interferometer and its application on absolute displacement measurement and on-line surface metrology Dejiao Lin, Xiangqian Jiang and Fang Xie Centre for Precision Technologies,

More information

AN EXPERIMENT RESEARCH ON EXTEND THE RANGE OF FIBER BRAGG GRATING SENSOR FOR STRAIN MEASUREMENT BASED ON CWDM

AN EXPERIMENT RESEARCH ON EXTEND THE RANGE OF FIBER BRAGG GRATING SENSOR FOR STRAIN MEASUREMENT BASED ON CWDM Progress In Electromagnetics Research Letters, Vol. 6, 115 121, 2009 AN EXPERIMENT RESEARCH ON EXTEND THE RANGE OF FIBER BRAGG GRATING SENSOR FOR STRAIN MEASUREMENT BASED ON CWDM M. He, J. Jiang, J. Han,

More information

Distributed Weak Fiber Bragg Grating Vibration Sensing System Based on 3 3 Fiber Coupler

Distributed Weak Fiber Bragg Grating Vibration Sensing System Based on 3 3 Fiber Coupler PHOTONIC SENSORS / Vol. 8, No., 8: 46 6 Distributed eak Fiber Bragg Grating Vibration Sensing System Based on 3 3 Fiber Coupler ei LI, and Jian ZHANG * National Engineering Laboratory for Fiber Optic Sensing

More information

Analysis of the Tunable Asymmetric Fiber F-P Cavity for Fiber Strain Sensor Edge-Filter Demodulation

Analysis of the Tunable Asymmetric Fiber F-P Cavity for Fiber Strain Sensor Edge-Filter Demodulation PHOTONIC SENSORS / Vol. 4, No. 4, 014: 338 343 Analysis of the Tunable Asymmetric Fiber F-P Cavity for Fiber Strain Sensor Edge-Filter Demodulation Haotao CHEN and Youcheng LIANG * Guangzhou Ivia Aviation

More information

Open Access Design of Optical Fiber Fabry-Perot Sensors Based on Intensity and Phase with Parallel Processing

Open Access Design of Optical Fiber Fabry-Perot Sensors Based on Intensity and Phase with Parallel Processing Send Orders for Reprints to reprints@benthamscience.ae 146 The Open Automation and Control Systems Journal, 15, 7, 146-151 Open Access Design of Optical Fiber Fabry-Perot Sensors Based on Intensity and

More information

Tunable Multiwavelength Erbium-Doped Fiber Laser Employing PM-FBG and Mach Zehnder Interferometer with Optical Fiber Delay Line

Tunable Multiwavelength Erbium-Doped Fiber Laser Employing PM-FBG and Mach Zehnder Interferometer with Optical Fiber Delay Line Open Access Laser Employing PM-FBG and Mach Zehnder Interferometer with Optical Fiber Delay Line Volume 9, Number 3, June 2017 Wei He Da Li Lianqing Zhu Mingli Dong Fei Luo DOI: 10.1109/JPHOT.2017.2695671

More information

Compact two-mode (de)multiplexer based on symmetric Y-junction and Multimode interference waveguides

Compact two-mode (de)multiplexer based on symmetric Y-junction and Multimode interference waveguides Compact two-mode (de)multiplexer based on symmetric Y-junction and Multimode interference waveguides Yaming Li, Chong Li, Chuanbo Li, Buwen Cheng, * and Chunlai Xue State Key Laboratory on Integrated Optoelectronics,

More information

FMCW Multiplexing of Fiber Bragg Grating Sensors

FMCW Multiplexing of Fiber Bragg Grating Sensors 756 IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, VOL. 6, NO. 5, SEPTEMBER/OCTOBER 2000 FMCW Multiplexing of Fiber Bragg Grating Sensors Peter K. C. Chan, Wei Jin, Senior Member, IEEE, and M.

More information

Acoustic Emission Source Location Using a Distributed Feedback Fiber Laser Rosette

Acoustic Emission Source Location Using a Distributed Feedback Fiber Laser Rosette Sensors 2013, 13, 14041-14054; doi:10.3390/s131014041 Article OPEN ACCESS sensors ISSN 1424-8220 www.mdpi.com/journal/sensors Acoustic Emission Source Location Using a Distributed Feedback Fiber Laser

More information

Theory and Applications of Frequency Domain Laser Ultrasonics

Theory and Applications of Frequency Domain Laser Ultrasonics 1st International Symposium on Laser Ultrasonics: Science, Technology and Applications July 16-18 2008, Montreal, Canada Theory and Applications of Frequency Domain Laser Ultrasonics Todd W. MURRAY 1,

More information

All-Optical Clock Division Using Period-one Oscillation of Optically Injected Semiconductor Laser

All-Optical Clock Division Using Period-one Oscillation of Optically Injected Semiconductor Laser International Conference on Logistics Engineering, Management and Computer Science (LEMCS 2014) All-Optical Clock Division Using Period-one Oscillation of Optically Injected Semiconductor Laser Shengxiao

More information

Research Article Measurement of Microvibration by Using Dual-Cavity Fiber Fabry-Perot Interferometer for Structural Health Monitoring

Research Article Measurement of Microvibration by Using Dual-Cavity Fiber Fabry-Perot Interferometer for Structural Health Monitoring Shock and Vibration, Article ID 702404, 5 pages http://dx.doi.org/10.1155/2014/702404 Research Article Measurement of Microvibration by Using Dual-Cavity Fiber Fabry-Perot Interferometer for Structural

More information

Theoretical Analysis of Tunable Single-Core Comb Filter Based on MZI

Theoretical Analysis of Tunable Single-Core Comb Filter Based on MZI Theoretical Analysis of Tunable Single-Core Comb Filter Based on MZI J. N. Sikta*, M.S. Islam, N. N. Ripa Department of physics, Jahangirnagar University, Savar, Dhaka-134, Bangladesh *Corresponding email:

More information

No. 9 Influence of laser intensity in second-harmonic detection the 2ν3 band located at μm. There are several lines labelled as P, Q, a

No. 9 Influence of laser intensity in second-harmonic detection the 2ν3 band located at μm. There are several lines labelled as P, Q, a Vol 14 No 9, September 2005 cfl 2005 Chin. Phys. Soc. 1009-1963/2005/14(09)/1904-06 Chinese Physics and IOP Publishing Ltd Influence of laser intensity in second-harmonic detection with tunable diode laser

More information

visibility values: 1) V1=0.5 2) V2=0.9 3) V3=0.99 b) In the three cases considered, what are the values of FSR (Free Spectral Range) and

visibility values: 1) V1=0.5 2) V2=0.9 3) V3=0.99 b) In the three cases considered, what are the values of FSR (Free Spectral Range) and EXERCISES OF OPTICAL MEASUREMENTS BY ENRICO RANDONE AND CESARE SVELTO EXERCISE 1 A CW laser radiation (λ=2.1 µm) is delivered to a Fabry-Pérot interferometer made of 2 identical plane and parallel mirrors

More information

Fiber-Optic Laser Gyroscope with Current Modulation of the Optical Power

Fiber-Optic Laser Gyroscope with Current Modulation of the Optical Power Bulg. J. Phys. 43 (2016) 100 109 Fiber-Optic Laser Gyroscope with Current Modulation of the Optical Power E. Stoyanova 1,2, A. Angelow 1, G. Dyankov 3, T.L. Dimitrova 4 1 Institute of Solid State Physics,

More information

(2016) 2015 IEEE SENSORS

(2016) 2015 IEEE SENSORS Fusiek, Grzegorz and Nelson, John and Orr, Philip and Niewczas, Pawel and Booth, Campbell (2016) Frequency characterization of an opticallyinterrogated Rogowski coil for smart grid protection applications.

More information

Laboratory investigation of an intensiometric dual FBG-based hybrid voltage sensor

Laboratory investigation of an intensiometric dual FBG-based hybrid voltage sensor Fusiek, Grzegorz and Niewczas, Pawel (215) Laboratory investigation of an intensiometric dual FBG-based hybrid voltage sensor. In: Proceedings of SPIE - The International Society for Optical Engineering.

More information

Transient Control in Dynamically Reconfigured Networks with Cascaded Erbium Doped Fiber Amplifiers

Transient Control in Dynamically Reconfigured Networks with Cascaded Erbium Doped Fiber Amplifiers Transient Control in Dynamically Reconfigured Networks with Cascaded Erbium Doped Fiber Amplifiers Lei Zong, Ting Wang lanezong@nec-labs.com NEC Laboratories America, Princeton, New Jersey, USA WOCC 2007

More information

Progress of Optical Fiber Sensors and Its Application in Harsh Environment

Progress of Optical Fiber Sensors and Its Application in Harsh Environment Photonic Sensors (2011) Vol. 1, No. 1: 84-89 DOI: 10.1007/s13320-010-0012-1 Review Photonic Sensors Progress of Optical Fiber Sensors and Its Application in Harsh Environment Min ZHANG, Xiaohong MA, Liwei

More information

Performance Investigation of RAMAN-EDFA HOA for DWDM System (Received 17 September, 2016 Accepted 02 October, 2016)

Performance Investigation of RAMAN-EDFA HOA for DWDM System (Received 17 September, 2016 Accepted 02 October, 2016) Performance Investigation of RAMAN-EDFA HOA for DWDM System (Received 17 September, 2016 Accepted 02 October, 2016) ABSTRACT Neha Thakral Research Scholar, DAVIET, Jalandhar nthakral9@gmail.com Earlier

More information

Multi-format all-optical-3r-regeneration technology

Multi-format all-optical-3r-regeneration technology Multi-format all-optical-3r-regeneration technology Masatoshi Kagawa Hitoshi Murai Amount of information flowing through the Internet is growing by about 40% per year. In Japan, the monthly average has

More information

A WDM passive optical network enabling multicasting with color-free ONUs

A WDM passive optical network enabling multicasting with color-free ONUs A WDM passive optical network enabling multicasting with color-free ONUs Yue Tian, Qingjiang Chang, and Yikai Su * State Key Laboratory of Advanced Optical Communication Systems and Networks, Department

More information

NEW DIGITAL ANGLE MEASUREMENT FACILITY BASED ON FPGA

NEW DIGITAL ANGLE MEASUREMENT FACILITY BASED ON FPGA 30 th ovember 202. Vol. 45 o.2 ISS: 992-8645 www.jatit.org E-ISS: 87-395 EW DIGITAL AGLE MEASUREMET FACILITY BASED O FPGA HAO ZHAO, 2 HAO FEG Jiaxing University, Jiaxing Zhejiang China 2 Hangzhou Dianzi

More information

All optical wavelength converter based on fiber cross-phase modulation and fiber Bragg grating

All optical wavelength converter based on fiber cross-phase modulation and fiber Bragg grating All optical wavelength converter based on fiber cross-phase modulation and fiber Bragg grating Pavel Honzatko a, a Institute of Photonics and Electronics, Academy of Sciences of the Czech Republic, v.v.i.,

More information

Miniature fiber optic pressure and temperature sensors

Miniature fiber optic pressure and temperature sensors Miniature fiber optic pressure and temperature sensors Juncheng Xu 1, Xingwei Wang, Kristie L Cooper, Gary R. Pickrell, and Anbo Wang Center for Photonics Technology Bradley Department of Electrical and

More information

Lecture 6 Fiber Optical Communication Lecture 6, Slide 1

Lecture 6 Fiber Optical Communication Lecture 6, Slide 1 Lecture 6 Optical transmitters Photon processes in light matter interaction Lasers Lasing conditions The rate equations CW operation Modulation response Noise Light emitting diodes (LED) Power Modulation

More information

Laser Diode. Photonic Network By Dr. M H Zaidi

Laser Diode. Photonic Network By Dr. M H Zaidi Laser Diode Light emitters are a key element in any fiber optic system. This component converts the electrical signal into a corresponding light signal that can be injected into the fiber. The light emitter

More information

Temporal coherence characteristics of a superluminescent diode system with an optical feedback mechanism

Temporal coherence characteristics of a superluminescent diode system with an optical feedback mechanism VI Temporal coherence characteristics of a superluminescent diode system with an optical feedback mechanism Fang-Wen Sheu and Pei-Ling Luo Department of Applied Physics, National Chiayi University, Chiayi

More information

Development of High Temperature Acoustic Emission Sensing System Using Fiber Bragg Grating

Development of High Temperature Acoustic Emission Sensing System Using Fiber Bragg Grating PHOTONIC SENSORS / Vol., No. 1, 1: 5 Development of High Temperature Acoustic Emission Sensing System Using Fiber Bragg Grating Dandan PANG 1,*, Qingmei SUI 3, Ming WANG 1,, Dongmei GUO 1, and Yaozhang

More information

All-Optical Signal Processing and Optical Regeneration

All-Optical Signal Processing and Optical Regeneration 1/36 All-Optical Signal Processing and Optical Regeneration Govind P. Agrawal Institute of Optics University of Rochester Rochester, NY 14627 c 2007 G. P. Agrawal Outline Introduction Major Nonlinear Effects

More information

Timing Noise Measurement of High-Repetition-Rate Optical Pulses

Timing Noise Measurement of High-Repetition-Rate Optical Pulses 564 Timing Noise Measurement of High-Repetition-Rate Optical Pulses Hidemi Tsuchida National Institute of Advanced Industrial Science and Technology 1-1-1 Umezono, Tsukuba, 305-8568 JAPAN Tel: 81-29-861-5342;

More information

Performance of Optical Encoder and Optical Multiplexer Using Mach-Zehnder Switching

Performance of Optical Encoder and Optical Multiplexer Using Mach-Zehnder Switching RESEARCH ARTICLE OPEN ACCESS Performance of Optical Encoder and Optical Multiplexer Using Mach-Zehnder Switching Abhishek Raj 1, A.K. Jaiswal 2, Mukesh Kumar 3, Rohini Saxena 4, Neelesh Agrawal 5 1 PG

More information

The Lightwave Model 142 CW Visible Ring Laser, Beam Splitter, Model ATM- 80A1 Acousto-Optic Modulator, and Fiber Optic Cable Coupler Optics Project

The Lightwave Model 142 CW Visible Ring Laser, Beam Splitter, Model ATM- 80A1 Acousto-Optic Modulator, and Fiber Optic Cable Coupler Optics Project The Lightwave Model 142 CW Visible Ring Laser, Beam Splitter, Model ATM- 80A1 Acousto-Optic Modulator, and Fiber Optic Cable Coupler Optics Project Stephen W. Jordan Seth Merritt Optics Project PH 464

More information

Rogério Nogueira Instituto de Telecomunicações Pólo de Aveiro Departamento de Física Universidade de Aveiro

Rogério Nogueira Instituto de Telecomunicações Pólo de Aveiro Departamento de Física Universidade de Aveiro Fiber Bragg Gratings for DWDM Optical Networks Rogério Nogueira Instituto de Telecomunicações Pólo de Aveiro Departamento de Física Universidade de Aveiro Overview Introduction. Fabrication. Physical properties.

More information

Fiber Pigtailed Variable Frequency Shifters Acousto-optic products

Fiber Pigtailed Variable Frequency Shifters Acousto-optic products Fiber Pigtailed Variable Frequency Shifters Acousto-optic products Introduction Frequency Shift LASER DOPPLER VIBROMETER (LDV) 3- PHYSICAL PRINCIPLES MAIN EQUATIONS An RF signal applied to a piezo-electric

More information

FFP-C Fiber Fabry-Perot Controller OPERATING INSTRUCTIONS. Version 1.0 MICRON OPTICS, INC.

FFP-C Fiber Fabry-Perot Controller OPERATING INSTRUCTIONS. Version 1.0 MICRON OPTICS, INC. FFP-C Fiber Fabry-Perot Controller OPERATING INSTRUCTIONS Version 1.0 MICRON OPTICS, INC. 1852 Century Place NE Atlanta, GA 30345 USA Tel (404) 325-0005 Fax (404) 325-4082 www.micronoptics.com Page 2 Table

More information

High-Resolution AWG-based fiber bragg grating interrogator Pustakhod, D.; Kleijn, E.; Williams, K.A.; Leijtens, X.J.M.

High-Resolution AWG-based fiber bragg grating interrogator Pustakhod, D.; Kleijn, E.; Williams, K.A.; Leijtens, X.J.M. High-Resolution AWG-based fiber bragg grating interrogator Pustakhod, D.; Kleijn, E.; Williams, K.A.; Leijtens, X.J.M. Published in: IEEE Photonics Technology Letters DOI: 10.1109/LPT.2016.2587812 Published:

More information

Phase-Sensitive Optical Time-Domain Reflectometry Amplified by Gated Raman Pump

Phase-Sensitive Optical Time-Domain Reflectometry Amplified by Gated Raman Pump PHOTONIC SENSORS / Vol. 5, No. 4, 2015: 345 350 Phase-Sensitive Optical Time-Domain Reflectometry Amplified by Gated Raman Pump Yi LI *, Yi ZHOU, Li ZHANG, Mengqiu FAN, and Jin LI Key Laboratory of Optical

More information

Photonics and Optical Communication

Photonics and Optical Communication Photonics and Optical Communication (Course Number 300352) Spring 2007 Dr. Dietmar Knipp Assistant Professor of Electrical Engineering http://www.faculty.iu-bremen.de/dknipp/ 1 Photonics and Optical Communication

More information

Bragg and fiber gratings. Mikko Saarinen

Bragg and fiber gratings. Mikko Saarinen Bragg and fiber gratings Mikko Saarinen 27.10.2009 Bragg grating - Bragg gratings are periodic perturbations in the propagating medium, usually periodic variation of the refractive index - like diffraction

More information

Integrated Optical Waveguide Sensor for Lighting Impulse Electric Field Measurement

Integrated Optical Waveguide Sensor for Lighting Impulse Electric Field Measurement PHOTONIC SENSORS / Vol. 4, No. 3, 2014: 215 219 Integrated Optical Waveguide Sensor for Lighting Impulse Electric Field Measurement Jiahong ZHANG *, Fushen CHEN, Bao SUN, and Kaixin CHEN Key Laboratory

More information

Phase Noise Modeling of Opto-Mechanical Oscillators

Phase Noise Modeling of Opto-Mechanical Oscillators Phase Noise Modeling of Opto-Mechanical Oscillators Siddharth Tallur, Suresh Sridaran, Sunil A. Bhave OxideMEMS Lab, School of Electrical and Computer Engineering Cornell University Ithaca, New York 14853

More information

Length and Position Measurement

Length and Position Measurement Length and Position Measurement Primary standards were once based on the length of a bar of metal at a given temperature. The present standard is: 1 meter = distance traveled by light in a vacuum in 3.335641

More information

Fiber-based components. by: Khanh Kieu

Fiber-based components. by: Khanh Kieu Fiber-based components by: Khanh Kieu Projects 1. Handling optical fibers, numerical aperture 2. Measurement of fiber attenuation 3. Connectors and splices 4. Free space coupling of laser into fibers 5.

More information

Experimental demonstration of both inverted and non-inverted wavelength conversion based on transient cross phase modulation of SOA

Experimental demonstration of both inverted and non-inverted wavelength conversion based on transient cross phase modulation of SOA Experimental demonstration of both inverted and non-inverted wavelength conversion based on transient cross phase modulation of SOA Songnian Fu, Jianji Dong *, P. Shum, and Liren Zhang (1) Network Technology

More information

Lab Report 3: Speckle Interferometry LIN PEI-YING, BAIG JOVERIA

Lab Report 3: Speckle Interferometry LIN PEI-YING, BAIG JOVERIA Lab Report 3: Speckle Interferometry LIN PEI-YING, BAIG JOVERIA Abstract: Speckle interferometry (SI) has become a complete technique over the past couple of years and is widely used in many branches of

More information

MICROWAVE photonics is an interdisciplinary area

MICROWAVE photonics is an interdisciplinary area 314 JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 27, NO. 3, FEBRUARY 1, 2009 Microwave Photonics Jianping Yao, Senior Member, IEEE, Member, OSA (Invited Tutorial) Abstract Broadband and low loss capability of

More information

Design of Spread-Spectrum Communication System Based on FPGA

Design of Spread-Spectrum Communication System Based on FPGA Sensors & Transducers 203 by IFSA http://www.sensorsportal.com Design of Spread-Spectrum Communication System Based on FPGA Yixin Yan, Xiaolei Liu, 2* Xiaobing Zhang College Measurement Control Technology

More information

Tunable single frequency fiber laser based on FP-LD injection locking

Tunable single frequency fiber laser based on FP-LD injection locking Tunable single frequency fiber laser based on FP-LD injection locking Aiqin Zhang, Xinhuan Feng, * Minggui Wan, Zhaohui Li, and Bai-ou Guan Institute of Photonics Technology, Jinan University, Guangzhou,

More information

EE-4022 Experiment 3 Frequency Modulation (FM)

EE-4022 Experiment 3 Frequency Modulation (FM) EE-4022 MILWAUKEE SCHOOL OF ENGINEERING 2015 Page 3-1 Student Objectives: EE-4022 Experiment 3 Frequency Modulation (FM) In this experiment the student will use laboratory modules including a Voltage-Controlled

More information

a 1550nm telemeter for outdoor application based on off-the-shelf components

a 1550nm telemeter for outdoor application based on off-the-shelf components a 155nm telemeter for outdoor application based on off-the-shelf components Joffray Guillory, Jean-Pierre Wallerand, Jorge Garcia Marquez, Daniel Truong (mechanical engineering), Christophe Alexandre (digital

More information

DC Index Shifted Dual Grating Based Superstructure Fiber Bragg Grating as Multichannel FBG and Multiparameter Sensor

DC Index Shifted Dual Grating Based Superstructure Fiber Bragg Grating as Multichannel FBG and Multiparameter Sensor IJCTA Vol.8, No.1, Jan-June 2015, Pp.208-212 International Sciences Press, India DC Index Shifted Dual Grating Based Superstructure Fiber Bragg Grating as Multichannel FBG and Multiparameter Sensor Somnath

More information

Silicon Photonic Device Based on Bragg Grating Waveguide

Silicon Photonic Device Based on Bragg Grating Waveguide Silicon Photonic Device Based on Bragg Grating Waveguide Hwee-Gee Teo, 1 Ming-Bin Yu, 1 Guo-Qiang Lo, 1 Kazuhiro Goi, 2 Ken Sakuma, 2 Kensuke Ogawa, 2 Ning Guan, 2 and Yong-Tsong Tan 2 Silicon photonics

More information

Localization of underwater moving sound source based on time delay estimation using hydrophone array

Localization of underwater moving sound source based on time delay estimation using hydrophone array Journal of Physics: Conference Series PAPER OPEN ACCESS Localization of underwater moving sound source based on time delay estimation using hydrophone array To cite this article: S. A. Rahman et al 2016

More information

OPSENS WHITE-LIGHT POLARIZATION INTERFEROMETRY TECHNOLOGY

OPSENS WHITE-LIGHT POLARIZATION INTERFEROMETRY TECHNOLOGY OPSENS WHITE-LIGHT POLARIZATION INTERFEROMETRY TECHNOLOGY 1. Introduction Fiber optic sensors are made up of two main parts: the fiber optic transducer (also called the fiber optic gauge or the fiber optic

More information

High-power semiconductor lasers for applications requiring GHz linewidth source

High-power semiconductor lasers for applications requiring GHz linewidth source High-power semiconductor lasers for applications requiring GHz linewidth source Ivan Divliansky* a, Vadim Smirnov b, George Venus a, Alex Gourevitch a, Leonid Glebov a a CREOL/The College of Optics and

More information

Temporal phase mask encrypted optical steganography carried by amplified spontaneous emission noise

Temporal phase mask encrypted optical steganography carried by amplified spontaneous emission noise Temporal phase mask encrypted optical steganography carried by amplified spontaneous emission noise Ben Wu, * Zhenxing Wang, Bhavin J. Shastri, Matthew P. Chang, Nicholas A. Frost, and Paul R. Prucnal

More information

Design of Linear Sweep Source Based on DDS Used in Readout System for Wireless Passive Pressure Sensor

Design of Linear Sweep Source Based on DDS Used in Readout System for Wireless Passive Pressure Sensor PHOTONIC SENSORS / Vol. 4, No. 4, 2014: 359 365 Design of Linear Sweep Source Based on DDS Used in Readout System for Wireless Passive Pressure Sensor Yingping HONG 1,2, Tingli ZHENG 1,2, Ting LIANG 1,2,

More information

Performance Analysis of SOA-MZI based All-Optical AND & XOR Gate

Performance Analysis of SOA-MZI based All-Optical AND & XOR Gate International Journal of Current Engineering and Technology E-ISSN 2277 4106, P-ISSN 2347 5161 2016 INPRESSCO, All Rights Reserved Available at http://inpressco.com/category/ijcet Research Article Utkarsh

More information

Multiplexing. Timeline. Multiplexing. Types. Optically

Multiplexing. Timeline. Multiplexing. Types. Optically Multiplexing Multiplexing a process where multiple analog message signals or digital data streams are combined into one signal over a shared medium Types Time division multiplexing Frequency division multiplexing

More information

Multi-wavelength laser generation with Bismuthbased Erbium-doped fiber

Multi-wavelength laser generation with Bismuthbased Erbium-doped fiber Multi-wavelength laser generation with Bismuthbased Erbium-doped fiber H. Ahmad 1, S. Shahi 1 and S. W. Harun 1,2* 1 Photonics Research Center, University of Malaya, 50603 Kuala Lumpur, Malaysia 2 Department

More information

A Compact Miniaturized Frequency Selective Surface with Stable Resonant Frequency

A Compact Miniaturized Frequency Selective Surface with Stable Resonant Frequency Progress In Electromagnetics Research Letters, Vol. 62, 17 22, 2016 A Compact Miniaturized Frequency Selective Surface with Stable Resonant Frequency Ning Liu 1, *, Xian-Jun Sheng 2, and Jing-Jing Fan

More information

Performance Analysis of 112 Gb/s PDM- DQPSK Optical System with Frequency Swept Coherent Detected Spectral Amplitude Labels

Performance Analysis of 112 Gb/s PDM- DQPSK Optical System with Frequency Swept Coherent Detected Spectral Amplitude Labels , June 29 - July 1, 2016, London, U.K. Performance Analysis of 112 Gb/s PDM- DQPSK Optical System with Frequency Swept Coherent Detected Spectral Amplitude Labels Aboagye Isaac Adjaye, Chen Fushen, Cao

More information

Loop Mirror Multi-wavelength Brillouin Fiber Laser Utilizing Semiconductor Optical Amplifier and Fiber Bragg Grating

Loop Mirror Multi-wavelength Brillouin Fiber Laser Utilizing Semiconductor Optical Amplifier and Fiber Bragg Grating Loop Mirror Multi-wavelength Brillouin Fiber Laser Utilizing Semiconductor Optical Amplifier and Fiber Bragg Grating N. A. Idris 1,2,*, N. A. M. Ahmad Hambali 1,2, M.H.A. Wahid 1,2, N. A. Ariffin 1,2,

More information

Next-Generation Optical Fiber Network Communication

Next-Generation Optical Fiber Network Communication Next-Generation Optical Fiber Network Communication Naveen Panwar; Pankaj Kumar & manupanwar46@gmail.com & chandra.pankaj30@gmail.com ABSTRACT: In all over the world, much higher order off modulation formats

More information

PHOTONIC INTEGRATED CIRCUITS FOR PHASED-ARRAY BEAMFORMING

PHOTONIC INTEGRATED CIRCUITS FOR PHASED-ARRAY BEAMFORMING PHOTONIC INTEGRATED CIRCUITS FOR PHASED-ARRAY BEAMFORMING F.E. VAN VLIET J. STULEMEIJER # K.W.BENOIST D.P.H. MAAT # M.K.SMIT # R. VAN DIJK * * TNO Physics and Electronics Laboratory P.O. Box 96864 2509

More information

Hybrid Subcarrier Multiplexed Spectral-Amplitude-Coding Optical CDMA System Performance for Point-to-Point Optical Transmissions

Hybrid Subcarrier Multiplexed Spectral-Amplitude-Coding Optical CDMA System Performance for Point-to-Point Optical Transmissions CMU. J. Nat. Sci. (2008) Vol. 7(1) 109 Hybrid Subcarrier Multiplexed Spectral-Amplitude-Coding Optical CDMA System Performance for Point-to-Point Optical Transmissions R. K. Z. Sahbudin 1*, M. K. Abdullah

More information

Optical PLL for homodyne detection

Optical PLL for homodyne detection Optical PLL for homodyne detection 7 Capella Court Nepean, ON, Canada K2E 7X1 +1 (613) 224-4700 www.optiwave.com 2009 Optiwave Systems, Inc. Optical BPSK PLL building blocks Signal Generation and Detection

More information

Ultrasonic Detection Using π-phase-shifted Fiber Bragg Gratings

Ultrasonic Detection Using π-phase-shifted Fiber Bragg Gratings University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Theses, Dissertations, and Student Research from Electrical & Computer Engineering Electrical & Computer Engineering, Department

More information

Koji Arai / Stan Whitcomb LIGO Laboratory / Caltech. LIGO-G v1

Koji Arai / Stan Whitcomb LIGO Laboratory / Caltech. LIGO-G v1 Koji Arai / Stan Whitcomb LIGO Laboratory / Caltech LIGO-G1401144-v1 General Relativity Gravity = Spacetime curvature Gravitational wave = Wave of spacetime curvature Gravitational waves Generated by motion

More information

Biomedical Research 2017; Special Issue: ISSN X

Biomedical Research 2017; Special Issue: ISSN X Biomedical Research 2017; Special Issue: ISSN 0970-938X www.biomedres.info Research on the signal of 4 He pump magnetometer sensor using ECDL laser. Wang Chao 1,2, Zhou Zhijian 1,2*, Cheng Defu 1,2 1 College

More information

Optical monitoring technique based on scanning the gain profiles of erbium-doped fiber amplifiers for WDM networks

Optical monitoring technique based on scanning the gain profiles of erbium-doped fiber amplifiers for WDM networks Optics Communications () 8 www.elsevier.com/locate/optcom Optical monitoring technique based on scanning the gain profiles of erbium-doped fiber amplifiers for WDM networks Chien-Hung Yeh *, Chien-Chung

More information

White Paper Laser Sources For Optical Transceivers. Giacomo Losio ProLabs Head of Technology

White Paper Laser Sources For Optical Transceivers. Giacomo Losio ProLabs Head of Technology White Paper Laser Sources For Optical Transceivers Giacomo Losio ProLabs Head of Technology September 2014 Laser Sources For Optical Transceivers Optical transceivers use different semiconductor laser

More information

The Feedback PI controller for Buck-Boost converter combining KY and Buck converter

The Feedback PI controller for Buck-Boost converter combining KY and Buck converter olume 2, Issue 2 July 2013 114 RESEARCH ARTICLE ISSN: 2278-5213 The Feedback PI controller for Buck-Boost converter combining KY and Buck converter K. Sreedevi* and E. David Dept. of electrical and electronics

More information

ELECTROMAGNETIC FIELD APPLICATION TO UNDERGROUND POWER CABLE DETECTION

ELECTROMAGNETIC FIELD APPLICATION TO UNDERGROUND POWER CABLE DETECTION ELECTROMAGNETIC FIELD APPLICATION TO UNDERGROUND POWER CABLE DETECTION P Wang *, K Goddard, P Lewin and S Swingler University of Southampton, Southampton, SO7 BJ, UK *Email: pw@ecs.soton.ac.uk Abstract:

More information

Corrosion Assessment of Offshore Oil Pipeline Based on Ultrasonic. Technique

Corrosion Assessment of Offshore Oil Pipeline Based on Ultrasonic. Technique 17th World Conference on Nondestructive Testing, 25-28 Oct 2008, Shanghai, China Corrosion Assessment of Offshore Oil Pipeline Based on Ultrasonic Technique Qi ZHANG, Pei-wen QUE, Hua-ming LEI Institute

More information

Chirped Bragg Grating Dispersion Compensation in Dense Wavelength Division Multiplexing Optical Long-Haul Networks

Chirped Bragg Grating Dispersion Compensation in Dense Wavelength Division Multiplexing Optical Long-Haul Networks 363 Chirped Bragg Grating Dispersion Compensation in Dense Wavelength Division Multiplexing Optical Long-Haul Networks CHAOUI Fahd 3, HAJAJI Anas 1, AGHZOUT Otman 2,4, CHAKKOUR Mounia 3, EL YAKHLOUFI Mounir

More information

A Simple Accelerometer Calibrator

A Simple Accelerometer Calibrator Journal of Physics: Conference Series PAPER OPEN ACCESS A Simple Accelerometer Calibrator To cite this article: R A Salam et al 2016 J. Phys.: Conf. Ser. 739 012099 View the article online for updates

More information

Remote (250 km) Fiber Bragg Grating Multiplexing System. Montserrat Fernandez-Vallejo *, Sergio Rota-Rodrigo and Manuel Lopez-Amo

Remote (250 km) Fiber Bragg Grating Multiplexing System. Montserrat Fernandez-Vallejo *, Sergio Rota-Rodrigo and Manuel Lopez-Amo Sensors 2011, 11, 8711-8720; doi:10.3390/s110908711 OPEN ACCESS sensors ISSN 1424-8220 www.mdpi.com/journal/sensors Article Remote (250 km) Fiber Bragg Grating Multiplexing System Montserrat Fernandez-Vallejo

More information

DIODE LASER SPECTROSCOPY (160309)

DIODE LASER SPECTROSCOPY (160309) DIODE LASER SPECTROSCOPY (160309) Introduction The purpose of this laboratory exercise is to illustrate how we may investigate tiny energy splittings in an atomic system using laser spectroscopy. As an

More information

Optical fiber refractometry based on multimode interference

Optical fiber refractometry based on multimode interference Optical fiber refractometry based on multimode interference Orlando Frazão, 1, * Susana O. Silva, 1,2 Jaime Viegas, 1 Luís A. Ferreira, 1 Francisco M. Araújo, 1 and José L. Santos 1,2 1 Instituto de Engenharia

More information

Interferometer signal detection system for the VIRGO experiment. VIRGO collaboration

Interferometer signal detection system for the VIRGO experiment. VIRGO collaboration Interferometer signal detection system for the VIRGO experiment VIRGO collaboration presented by Raffaele Flaminio L.A.P.P., Chemin de Bellevue, Annecy-le-Vieux F-74941, France Abstract VIRGO is a laser

More information

Analysis of ultrasonic frequency response of surface attached fiber Bragg grating

Analysis of ultrasonic frequency response of surface attached fiber Bragg grating Analysis of ultrasonic frequency response of surface attached fiber Bragg grating Zhuoxuan Li, 1,2 Li Pei, 2, * Bo Dong, 1 Cheng Ma, 1 and Anbo Wang 1 1 Center for Photonics Technology, Bradley Department

More information

Impact of Double Cavity Fabry-Perot Demultiplexers on the Performance of. Dispersion Supported Transmission of Three 10 Gbit/s

Impact of Double Cavity Fabry-Perot Demultiplexers on the Performance of. Dispersion Supported Transmission of Three 10 Gbit/s Impact of Double Cavity Fabry-Perot Demultiplexers on the Performance of Dispersion Supported Transmission of Three 10 Gbit/s WDM Channels Separated 1 nm Mário M. Freire and José A. R. Pacheco de Carvalho

More information

Wavelength Control and Locking with Sub-MHz Precision

Wavelength Control and Locking with Sub-MHz Precision Wavelength Control and Locking with Sub-MHz Precision A PZT actuator on one of the resonator mirrors enables the Verdi output wavelength to be rapidly tuned over a range of several GHz or tightly locked

More information

Project Staff: Timothy A. Savas, Michael E. Walsh, Thomas B. O'Reilly, Dr. Mark L. Schattenburg, and Professor Henry I. Smith

Project Staff: Timothy A. Savas, Michael E. Walsh, Thomas B. O'Reilly, Dr. Mark L. Schattenburg, and Professor Henry I. Smith 9. Interference Lithography Sponsors: National Science Foundation, DMR-0210321; Dupont Agreement 12/10/99 Project Staff: Timothy A. Savas, Michael E. Walsh, Thomas B. O'Reilly, Dr. Mark L. Schattenburg,

More information

All-optical clock division at 40 GHz using a semiconductor amplifier. nonlinear interferometer

All-optical clock division at 40 GHz using a semiconductor amplifier. nonlinear interferometer All-optical clock division at 40 GHz using a semiconductor amplifier nonlinear interferometer R. J. Manning, I. D. Phillips, A. D. Ellis, A. E. Kelly, A. J. Poustie, K.J. Blow BT Laboratories, Martlesham

More information

HOMODYNE and heterodyne laser synchronization techniques

HOMODYNE and heterodyne laser synchronization techniques 328 JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 17, NO. 2, FEBRUARY 1999 High-Performance Phase Locking of Wide Linewidth Semiconductor Lasers by Combined Use of Optical Injection Locking and Optical Phase-Lock

More information

Optical communications

Optical communications Optical communications Components and enabling technologies Optical networking Evolution of optical networking: road map SDH = Synchronous Digital Hierarchy SONET = Synchronous Optical Network SDH SONET

More information

Bit error rate and cross talk performance in optical cross connect with wavelength converter

Bit error rate and cross talk performance in optical cross connect with wavelength converter Vol. 6, No. 3 / March 2007 / JOURNAL OF OPTICAL NETWORKING 295 Bit error rate and cross talk performance in optical cross connect with wavelength converter M. S. Islam and S. P. Majumder Department of

More information

Fiber-Optic Michelson Interferometer with Faraday Mirrors for Acoustic Sensing using a 3 3 Coupler and Symmetric Demodulation Scheme

Fiber-Optic Michelson Interferometer with Faraday Mirrors for Acoustic Sensing using a 3 3 Coupler and Symmetric Demodulation Scheme Fiber-Optic Michelson Interferometer with Faraday Mirrors for Acoustic Sensing using a 3 3 Coupler and Symmetric Demodulation Scheme Peter Lanier Gartland Thesis submitted to the Faculty of the Virginia

More information

This document is downloaded from DR-NTU, Nanyang Technological University Library, Singapore.

This document is downloaded from DR-NTU, Nanyang Technological University Library, Singapore. This document is downloaded from DR-NTU, Nanyang Technological University Library, Singapore. Title Wavelength detection in FBG sensor networks using least squares support vector regression Author(s) Chen,

More information

Photonics-Based Wideband Microwave Phase Shifter

Photonics-Based Wideband Microwave Phase Shifter Photonics-Based Wideband Microwave Phase Shifter Volume 9, Number 3, June 2017 Open Access Xudong Wang Tong Niu Erwin Hoi Wing Chan Xinhuan Feng Bai-ou Guan Jianping Yao DOI: 10.1109/JPHOT.2017.2697207

More information

Open Access On Improving the Time Synchronization Precision in the Electric Power System. Qiang Song * and Weifeng Jia

Open Access On Improving the Time Synchronization Precision in the Electric Power System. Qiang Song * and Weifeng Jia Send Orders for Reprints to reprints@benthamscience.ae The Open Electrical & Electronic Engineering Journal, 2015, 9, 61-66 61 Open Access On Improving the Time Synchronization Precision in the Electric

More information

Distributed Optical Fiber Vibration Sensor Based on Phase- Sensitive Optical Time Domain Reflectometry

Distributed Optical Fiber Vibration Sensor Based on Phase- Sensitive Optical Time Domain Reflectometry Distributed Optical Fiber Vibration Sensor Based on Phase- Sensitive Optical Time Domain Reflectometry by Meiqi Ren Thesis submitted to the Faculty of Graduate and Postdoctoral Studies In partial fulfillment

More information

Magnetic Field Sensing Based on Magnetic-Fluid-Clad Fiber-Optic Structure With Up-Tapered Joints

Magnetic Field Sensing Based on Magnetic-Fluid-Clad Fiber-Optic Structure With Up-Tapered Joints Based on Magnetic-Fluid-Clad Fiber-Optic Structure With Up-Tapered Joints Volume 6, Number 4, August 2014 Shengli Pu Shaohua Dong DOI: 10.1109/JPHOT.2014.2332476 1943-0655 Ó 2014 IEEE Based on Magnetic-Fluid-Clad

More information